←Select platform

SelectDevice Method

Summary
Selects the WIA device represented by the passed device ID.

Syntax
C#
C++/CLI
Python
public void SelectDevice( 
   string deviceId 
) 
public: 
void SelectDevice(  
   String^ deviceId 
)  
def SelectDevice(self,deviceId): 

Parameters

deviceId
String that contains the device ID. You can obtain this string by enumerating the available WIA devices on your machine.

Remarks

Use this function when working with multiple WIA devices installed on a machine in order to select the WIA device without displaying the Select Device dialog. To do this, enumerate the WIA devices by calling the EnumDevices method. Then use it to keep a list of all received device IDs. Then call SelectDevice method using the device ID for the device to be selected.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Wia; 
 
 
       
public void EnumDevicesExample(IntPtr parent) 
{ 
   if (!WiaSession.IsAvailable(WiaVersion.Version1)) 
   { 
      Console.WriteLine("WIA version 1.0 not installed."); 
      return; 
   } 
 
   WiaSession wiaSession = new WiaSession(); 
   wiaSession.Startup(WiaVersion.Version1); 
 
   DialogResult res = wiaSession.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault); 
   if (res != DialogResult.OK) 
   { 
      Console.WriteLine("Error selecting WIA device."); 
      wiaSession.Shutdown(); 
      return; 
   } 
 
   wiaSession.EnumDevicesEvent += new EventHandler<WiaEnumDevicesEventArgs>(wiaSession_EnumDevicesEvent); 
 
   Console.WriteLine("Available WIA Devices:\n"); 
   wiaSession.EnumDevices(); 
 
   wiaSession.EnumDevicesEvent -= new EventHandler<WiaEnumDevicesEventArgs>(wiaSession_EnumDevicesEvent); 
 
   wiaSession.Shutdown(); 
} 
 
void wiaSession_EnumDevicesEvent(object sender, WiaEnumDevicesEventArgs e) 
{ 
   string strMsg = string.Empty; 
 
   // print out some information about each device found into the console window. 
   strMsg = string.Format("\tDevice Name: {0}\n\tDevice Id: {1}\n\tDevice Description: {2}\n\n", e.DeviceName, e.DeviceID, e.DeviceDesc); 
   Console.WriteLine(strMsg); 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Wia Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.